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Background: The nicotine dependence (ND) has negative and smoking abstinence self-efficacy (SASE) has positive effects on successful smoking cessation, but scant data is now available for what is the mediating role of SASE on the relationship between ND and successful smoking cessation. The aim of this study was to assess the abovementioned mediation. Methods: A case–control study was conducted with 642 successful spontaneous quitters as the cases, and 700 failed spontaneous quitters as the controls. ND and SASE were evaluated by Fagerstrom Test for Nicotine Dependence (FTND) scale and SASE scale, respectively. Propensity score as covariate in the regression model was used to adjust for potential confounders of age, age of smoking initiation, occupation, educational level and marital status. Total effect was decomposed into direct and indirect (mediating) effect using logistic regression based on the KHB method proposed by Holm et al. Results: After adjusting for the aforementioned potential confounders, the mediating effects among the total effect of ND on successful spontaneous smoking cessation were 32.90%, 12.14%, 35.64% and 83.03% for the total score of SASE and its three context-specific situation scores, i.e. positive/social situation, negative/affective situation and habit/addictive situation, respectively. Conclusions: This study indicates that SASE has a partial mediating effect on the association of ND with successful spontaneous smoking cessation. To boost the smokers' SASE could increase the probability of successful smoking cessation.

Maternal and infant prepayment schemes(MIPSs) appeared in China in the early 1980s, as a way of helping women to set aside adequate funds for childbirth. The responsibility for design was devolved to the county level, and many different approaches have been applied. For this and other reasons, there has been no consensus on important matters such as the level of prepayment, the range of covered services, and whether township health centres or family planning stations should operate the schemes. We aimed to clarify some of the uncertainty by conducting combined analyses of cost, willingness to pay, and willingness to supply. We used structured survey instruments to interview 4271 households with children aged under one year, and 18 township health institutions. Our analyses suggest that the ideal prepayment should be higher and the range of covered services should be wider than the current average, and that health centres rather family planning stations should operate the schemes.